If you take the time from when Harvin was traded until now, Richardson has shown a steady improvment week to week.
I've read that Harvin was a pain in the ass in the WR room as well, and had most of those guys walking on egg shells. Percy had to get his targets or else.
Now that that distraction is gone, Richardson is blossoming. It's possible that Harvin stunted his growth a little bit. Either way, if Richardson keeps showing this same level of improvement through TC of next year, he'll easily be the best WR on this team, and might be one of the better WRs in the division in his 2nd year. Yup, I said it.
He's smart and polished. He already knows to say the right things. I was impressed with this kid before I ever saw him play, after one of his interviews in TC. He started out doing the little things right: blocking downfield, running correct routes etc. Now that he's getting more time on the field, he's showing better chemistry with Russ and getting good at the scramble drill. Keep in mind he didn't have a scrambler at Colorado, and his reps were limited earlier this year due to be buried behind Harvin.
The thing I like best about Richardson though, is that he brings something that really only Lockette brings to the table, yet he's going to be better at it, and that's stretching the field. None of the other starting WRs is going to be able to stretch the field like PRich will, and to top it off he can run a variety of routes. He's already a more complete WR than Wallace is in Miami, but he'll have the same effect. I'm excited to see this kid's potential.